/* ----------------------------------------------------------------
   VARIABLES (Root: colors, typography, spacing, radius, shadow)
------------------------------------------------------------------ */
:root {
  /* Color Palette */
  --color-background: #f9f9f8;
  --color-surface: #ffffff;
  --color-text: #181820;
  --color-primary: #3156a3;
  --color-primary-hover: #244074;
  --color-success: #377f6a;
  --color-warning: #b28d28;
  --color-danger: #cc4444;

  --color-neutral-900: #23232d;
  --color-neutral-700: #4e4e5a;
  --color-neutral-500: #9797a7;
  --color-neutral-300: #e3e3ea;
  --color-neutral-100: #f6f6f9;

  /* Typography */
  --font-family-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-family-serif: 'Georgia', serif;
  --font-size-base: 1rem;           /* 16px */
  --font-size-sm: 0.875rem;         /* 14px */
  --font-size-lg: 1.25rem;          /* 20px */
  --font-size-xl: 2rem;             /* 32px */
  --line-height-base: 1.6;
  --line-height-heading: 1.2;
  
  /* Spacing Scale (0 - 96px) */
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-24: 96px;

  /* Radius & Shadow */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-xs: 0 1px 2px rgba(40,40,72,0.03);
  --shadow-md: 0 4px 16px rgba(53,59,94,0.08);
  --shadow-lg: 0 12px 32px rgba(40,40,72,0.13);

  /* Transition */
  --transition-fast: 0.15s;
  --transition-normal: 0.3s;
  --transition-slow: 0.6s;
}

/* --------------------------------------------------------------
    RESET / NORMALIZE
---------------------------------------------------------------- */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
}
*, *::before, *::after {
  box-sizing: inherit;
}
body, h1, h2, h3, h4, h5, h6, p, ul, ol, dl, figure, blockquote {
  margin: 0;
  padding: 0;
}
ul, ol {
  list-style: none;
}
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
input, button, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}
a {
  color: inherit;
  text-decoration: inherit;
  cursor: pointer;
}

/* Respect user preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* --------------------------------------------------------------
   BASE ELEMENTS
---------------------------------------------------------------- */
body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  background: var(--color-background);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: 2.5rem;
  margin-top: var(--space-12);
}
h2 {
  font-size: 2rem;
  margin-top: var(--space-8);
}
h3 {
  font-size: 1.5rem;
  margin-top: var(--space-6);
}
h4 {
  font-size: 1.125rem;
  margin-top: var(--space-4);
}
h5, h6 {
  font-size: 1rem;
  margin-top: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-neutral-900);
}

/* Links 
---------------------------------------------------------------*/
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  outline: none;
}
a:hover, a:focus-visible {
  color: var(--color-primary-hover);
  text-decoration: underline;
}
a:active {
  color: var(--color-primary);
}

/* --------------------------------------------------------------
   UTILITIES
---------------------------------------------------------------- */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}
.flex {
  display: flex;
}
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.grid {
  display: grid;
  gap: var(--space-6);
}
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* --------------------------------------------------------------
   COMPONENTS
---------------------------------------------------------------- */
.button,
button,
input[type="submit"],
input[type="button"] {
  display: inline-block;
  padding: var(--space-2) var(--space-6);
  font-size: var(--font-size-base);
  font-family: inherit;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  text-align: center;
  font-weight: 500;
}
.button:hover, button:hover, input[type="submit"]:hover, input[type="button"]:hover,
.button:focus-visible, button:focus-visible, input[type="submit"]:focus-visible, input[type="button"]:focus-visible {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  outline: 2px solid var(--color-primary-hover);
  outline-offset: 1px;
}
.button:disabled, button:disabled, input[type="submit"]:disabled, input[type="button"]:disabled {
  background: var(--color-neutral-300);
  color: var(--color-neutral-700);
  cursor: not-allowed;
  box-shadow: none;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
textarea,
select {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-base);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-neutral-300);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-xs);
  transition: border var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}
input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
input:disabled, textarea:disabled, select:disabled {
  background: var(--color-neutral-100);
  color: var(--color-neutral-500);
  cursor: not-allowed;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  transition: box-shadow var(--transition-fast);
}
.card:hover, .card:focus-within {
  box-shadow: var(--shadow-lg);
}

/* Accessibility: Focus visible */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------
   HEADER & FOOTER STYLES (from home.css)
---------------------------------------------------------------- */
.pd-header {
  background: var(--color-surface);
  box-shadow: 0 1px 6px rgba(40,40,72,0.06);
  position: sticky;
  top: 0;
  z-index: 30;
}
.pd-logo, .pd-footer-logo {
  font-family: var(--font-family-serif);
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  letter-spacing: 1px;
  font-weight: 700;
  text-decoration: none;
}
.pd-nav {
  min-height: 70px;
}
.pd-nav-list {
  gap: var(--space-6);
  display: flex;
  align-items: center;
}
.pd-nav-list li a {
  transition: color var(--transition-fast);
  font-weight: 500;
}
.pd-menu-toggle {
  background: none;
  border: none;
  display: none;
  width: 44px;
  height: 44px;
  justify-content: center;
  align-items: center;
}
.pd-menu-icon {
  width: 26px;
  height: 2px;
  background: var(--color-text);
  display: block;
  position: relative;
  border-radius: 2px;
}
.pd-menu-icon::before,
.pd-menu-icon::after {
  content: '';
  position: absolute;
  width: 26px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  left: 0;
  transition: transform var(--transition-fast);
}
.pd-menu-icon::before { top: -8px; }
.pd-menu-icon::after { top: 8px; }
.pd-menu-toggle[aria-expanded="true"] .pd-menu-icon {
  background: transparent;
}
.pd-menu-toggle[aria-expanded="true"] .pd-menu-icon::before {
  transform: translateY(8px) rotate(45deg);
}
.pd-menu-toggle[aria-expanded="true"] .pd-menu-icon::after {
  transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 900px) {
  .pd-nav-list {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background: var(--color-surface);
    flex-direction: column;
    gap: var(--space-6);
    box-shadow: var(--shadow-md);
    padding: var(--space-8) 0 var(--space-6);
    z-index: 10;
    display: none;
  }
  .pd-nav-list.open { display: flex; }
  .pd-menu-toggle { display: flex; }
}

.pd-footer {
  background: var(--color-surface);
  box-shadow: 0 -1px 8px rgba(50,50,90,0.07);
  padding: var(--space-12) 0 var(--space-8);
  position: relative;
  z-index: 5;
}
.pd-footer-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(3, minmax(160px, 1fr));
  align-items: center;
}
.pd-footer-brand {
  grid-column: 1 / span 1;
}
.pd-footer-logo {
  font-family: var(--font-family-serif);
  font-size: 1.5rem;
  color: var(--color-primary);
  font-weight: 700;
}
.pd-footer-nav ul, .pd-footer-legal ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.pd-footer-nav a, .pd-footer-legal a {
  font-size: var(--font-size-sm);
}
.pd-footer-copyright {
  grid-column: 1 / -1;
  text-align: center;
  font-size: var(--font-size-sm);
  margin-top: var(--space-6);
  color: var(--color-neutral-500);
}

/* Cookie Consent Banner */
.pd-cookie-consent {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  width: 100%;
  background: var(--color-surface);
  box-shadow: 0 -4px 20px rgba(40,40,72,0.11);
  z-index: 1000;
  display: none;
  padding: var(--space-4) 0;
}
.pd-cookie-consent.active {
  display: block;
}
.pd-cookie-container {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
  justify-content: center;
  padding: 0 var(--space-6);
}
.pd-cookie-text {
  font-size: var(--font-size-sm);
  color: var(--color-neutral-900);
  max-width: 580px;
}
.pd-cookie-actions {
  display: flex;
  gap: var(--space-2);
}
.pd-cookie-reject {
  background: var(--color-neutral-300);
  color: var(--color-text);
}
.pd-cookie-reject:hover, .pd-cookie-reject:focus-visible {
  background: var(--color-danger);
  color: #fff;
}

@media (max-width: 650px) {
  .container {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }
  .pd-footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  .pd-cookie-container {
    padding: 0 var(--space-2);
  }
}